It has a powerful removal called Deck Bounce, but it needs a trigger and is useless against monsters
Spell Normal If your opponent controls a monster(s) Special Summoned from the Extra Deck and you do not: Choose 4 "Number" Xyz Monsters from your Extra Deck with different Ranks, plus a 5th "Number" Xyz Monster whose "Number" value in its name equals the combined "Number" values of the 4 other monsters, Special Summon that 5th "Number" monster (this is treated as an Xyz Summon), and attach the 4 chosen monsters to it as material, but you cannot Special Summon monsters, except "Number" Xyz Monsters, while you control that face-up monster
If this card is in your GY: You can Special Summon this card, then you can attach 1 "Goblin" monster from your GY to it as material
Excavated cards still count as being in the deck until they are sent somewhere else by the effect of the card
This can be activated as many times per turn as long as there are counters available, so combo the effect of the "B.E.S." monster "B.E.S